ok my 91 mustang has its fair share of mods i'll list them B-cam advanced 4 degress thumper ported e7 heads tmoss ported stock lower intake gasket matched upper 73 mm vortech MAF CAI UD Pullies. headers and Hpipe and bullet mufflers 190lph fuel pump adj FPR i am soon to be getting a 65 or 70 mm TB i have played with timin and i have a FP guage on the rail with adj regulator so i can play with it some. but i feel there is some hidden power to be unleashed with some fine tuning. i have had people mention tuning the computer. like they said about a programmer that you plug into the computer or something and you can mess with timing, A/F and the like. is this how they work? i look around on the net and get super confused. i would like my own programmer deal and not have to get a chip and be limited to my current combo, i would like to try diff things and tinker around. can somone head me into the right direction?